Dowel-pin.



B. P. HALL.

DOWEL PIN.

APPLICATION FILED MAR. 5. 1918.

Lg?. Patented Dec. 17, 1918.

. 1?/ n@ t* n f2 "2) -Ll/ manera.

' Beit known thatI BUnroN n z en ef the United rnnr onnioE.

nimron P. HALL, or FAN-woon, NEW JERSEY.

To all whom may concern.'

-tates'l residing at Fan-l wo'od,in the county of nion and State of New Jersey, have invented a new and usefuli Bowel-Pin" for Use in Carpentry,-Jo1ner.y, i

yShip-Building, and Similar ofwhich the following is a specication'.

A My invention consists in the novel features hereinafter more fully described.

The objectsof my improvement are: First, to produce a'dowel pin2 which will not get loose' in the corres ending opening l or dowel hole, which is ma e to receive it.

Second, to have said lmproved dowel pin.

simple, durable and inexpensive.

I attain these objects byI the ,dowelpin,

I `onejforrn o-which is illustrated in the ac' eompanying drawings, or by any mechanical equivalent or obvlous modification of the same. y r

In the-drawings Figure 1 is an end view of the referred form ofmy improved dowel in; ig. 2 is a side elevation-of the same;

ig. 3 is an end view 0f a piece of timber,v showing .two of my improved dowelpins in vposition .in the corresponding openings or y doma haies in said timber.

Similar numerals and letters refer to similar arts throughout the several views.

1i) ldesignates the dowel pin, which is shown in Fig. 2 as having its-ends 12 rounded` oii' for facilitating the driving 'of said dowel pin into a hole which is of a somewhat smaller diameter.

The dowel pin 11 is provided with a groove 13, which extends lengthwise from end to end of said pin 'and reaches in depth nearly to the axis of said pin.

fThe considerable depth -of said groove 13 allowsthe portions-11a of said pin 11 an f appreciable amount "of deflection or spring,

, powEL-PIN,

p `simultanea' of Letterwsratent." Patented-D@ 17, 1918*, Application iled March 5, 1918. Serial No. 220,623.y 'i

which enables the pinto be driven tight into an opening in thetimber 14, which is somewhat smaller in diameter than said pim-and it also tends to keep the'pin in position in sald opening after it isdrlven in. The Sides of said Igroove 13 may be made parallel to :begin with, as shown in Fig. 1; after the pin 11 is driven home, the portions pin will converge at their ends, and the groove 13 will 11 of Said assume the -shape shown in Fig. 3. p

Many changes could be madein my lirnproved dowel pin without departing from the main scope of my invention; I do not, therefore, restrict myself to the. exact formv yof my dowel pin as shown in the drawings;

but I intend to linclude also all mechanical 'equivalents and reasonably obvious modifications of the same.

What I claim as my invention, and desire to secure by Letters Patent is:

4"1. A substantially solid dowel pin 0f suitable material having formed therein a lon# gitudinal groove extending from end to end 'thereof and adapted to'allow the portions of said pin adjacent thereto to be sprung, thereby enabling said pin to be driven into a dowel hole of a somewhat smaller diameter than said pin and to be .kept securely in position in said dowel hole.

2. A substantially solid dowel pin of suitgitudinal groove, reaching substantially to the axis of said pin, said groove being adapted to allow the portions of said pin adjacent thereto 'a considerable amount of spring, j

BURTON r.V HALL.

' able material having formed therein a Torr" 

